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Placing the cursor after an undo there where it was before the do, 

and handling multibyte characters correctly.
*Patch by Mark Majeres.*


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4908 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
Benno Schulenberg 2014-05-25 19:41:49 +00:00
parent 0ae38b4ef8
commit f5ac8c1ee1
6 changed files with 70 additions and 67 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
2014-05-25 Mark Majeres <mark@engine12.com>
* src/chars.c (addstrings): New function, concatenates two allocated
strings, tacking the second onto the first and freeing the second.
* src/cut.c (do_uncut_text): Update the undo structure for a paste.
* src/text.c (undo_cut, redo_cut, add_undo, update_undo): Place the
cursor after an undo there where it was before the do, and handle
multibyte characters correctly.
2014-05-23 Benno Schulenberg <bensberg@justemail.net>
* src/winio.c (edit_draw): Finally, the proper fix for bug #31743;
telling ncurses to really redraw the line, without optimization, so

11
src/chars.c
View File

@ -43,6 +43,17 @@ static const wchar_t bad_wchar = 0xFFFD;
static const char *const bad_mbchar = "\xEF\xBF\xBD";
static const int bad_mbchar_len = 3;
/* Concatenate two allocated strings. */
char* addstrings(char* str1, size_t len1, char* str2, size_t len2)
{
str1 = charealloc(str1, len1 + len2 + 1);
str1[len1] = '\0';
strncat(&str1[len1], str2, len2);
free(str2);
return str1;
}
/* Enable UTF-8 support. */
void utf8_init(void)
{

4
src/cut.c
View File

@ -274,6 +274,10 @@ void do_uncut_text(void)
* at the current cursor position. */
copy_from_filestruct(cutbuffer);
#ifndef NANO_TINY
update_undo(PASTE);
#endif
/* Set the current place we want to where the text from the
* cutbuffer ends. */
openfile->placewewant = xplustabs();

1
src/nano.h
View File

@ -572,6 +572,7 @@ enum
#define UNdel_del (1<<0)
#define UNdel_backspace (1<<1)
#define UNsplit_madenew (1<<2)
#define UNcut_cutline (1<<3)
#endif /* !NANO_TINY */
#define VIEW TRUE

1
src/proto.h
View File

@ -162,6 +162,7 @@ char *striponedir(const char *path);
void utf8_init(void);
bool using_utf8(void);
#endif
char *addstrings(char* str1, size_t len1, char* str2, size_t len2);
#ifndef HAVE_ISBLANK
bool nisblank(int c);
#endif

112
src/text.c
View File

@ -375,11 +375,17 @@ void undo_cut(undo *u)
;
/* Get to where we need to uncut from. */
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
if (u->xflags == UNcut_cutline)
goto_line_posx(u->mark_begin_lineno, 0);
else
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
copy_from_filestruct(cutbuffer);
free_filestruct(cutbuffer);
cutbuffer = NULL;
if (u->xflags == UNcut_cutline)
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
}
/* Redo a cut, or undo an uncut. */
@ -406,7 +412,7 @@ void redo_cut(undo *u)
if (!ISSET(CUT_TO_END))
openfile->mark_set = TRUE;
openfile->mark_begin_x = u->mark_begin_x;
openfile->mark_begin_x = (u->xflags == UNcut_cutline) ? 0 : u->mark_begin_x;
do_cut_text(FALSE, u->to_end, TRUE);
openfile->mark_set = FALSE;
openfile->mark_begin = NULL;
@ -460,9 +466,7 @@ void do_undo(void)
strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
free(f->data);
f->data = data;
if (u->xflags == UNdel_backspace)
openfile->current_x += strlen(u->strdata);
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x + 1);
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
break;
#ifndef DISABLE_WRAPPING
case SPLIT:
@ -489,7 +493,7 @@ void do_undo(void)
free(f->data);
f->data = data;
splice_node(f, t, f->next);
gotolinecolumn = TRUE;
goto_line_posx(u->lineno, u->begin);
break;
case CUT_EOF:
case CUT:
@ -504,8 +508,8 @@ void do_undo(void)
undidmsg = _("line break");
if (f->next) {
filestruct *foo = f->next;
f->data = (char *) nrealloc(f->data, strlen(f->data) + strlen(f->next->data) + 1);
strcat(f->data, f->next->data);
f->data = (char *) nrealloc(f->data, strlen(f->data) + strlen(&f->next->data[u->mark_begin_x]) + 1);
strcat(f->data, &f->next->data[u->mark_begin_x]);
unlink_node(foo);
delete_node(foo);
}
@ -629,7 +633,7 @@ void do_redo(void)
delete_node(tmp);
}
renumber(f);
gotolinecolumn = TRUE;
goto_line_posx(u->lineno, u->begin);
break;
case CUT_EOF:
case CUT:
@ -723,6 +727,11 @@ void do_enter(bool undoing)
openfile->placewewant = xplustabs();
#ifndef NANO_TINY
if (!undoing)
update_undo(ENTER);
#endif
edit_refresh_needed = TRUE;
}
@ -879,15 +888,14 @@ void add_undo(undo_type current_action)
/* We need to start copying data into the undo buffer
* or we won't be able to restore it later. */
case ADD:
data = charalloc(2);
data[0] = '\0';
u->strdata = data;
break;
case DEL:
if (u->begin != strlen(fs->current->data)) {
data = mallocstrncpy(NULL, &fs->current->data[u->begin], 2);
data[1] = '\0';
u->strdata = data;
char *char_buf = charalloc(mb_cur_max() + 1);
int char_buf_len = parse_mbchar(&fs->current->data[u->begin], char_buf, NULL);
char_buf[char_buf_len] = '\0';
u->strdata = char_buf; /* Note: there is likely more memory allocated than necessary. */
u->mark_begin_x += char_buf_len;
break;
}
/* Else purposely fall into unsplit code. */
@ -929,7 +937,7 @@ void add_undo(undo_type current_action)
else if (!ISSET(CUT_TO_END) && !u->to_end) {
/* The entire line is being cut regardless of the cursor position. */
u->begin = 0;
u->mark_begin_x = 0;
u->xflags = UNcut_cutline;
}
break;
case PASTE:
@ -942,18 +950,6 @@ void add_undo(undo_type current_action)
u->mark_begin_lineno = fs->current->lineno;
u->mark_begin_x = fs->current_x;
u->lineno = fs->current->lineno + cutbottom->lineno - cutbuffer->lineno;
filestruct *fs_buff = cutbuffer;
if (fs_buff->lineno == cutbottom->lineno)
u->begin = fs->current_x + get_totsize(fs_buff, cutbottom);
else {
/* Advance fs_buff to the last line in the cutbuffer. */
while (fs_buff->lineno != cutbottom->lineno && fs_buff->next != NULL)
fs_buff = fs_buff->next;
assert(fs_buff->next != NULL);
u->begin = get_totsize(fs_buff, cutbottom);
}
u->mark_set = TRUE;
}
break;
@ -979,8 +975,6 @@ void add_undo(undo_type current_action)
void update_undo(undo_type action)
{
undo *u;
char *data;
int len = 0;
openfilestruct *fs = openfile;
if (!ISSET(UNDOABLE))
@ -998,7 +992,7 @@ void update_undo(undo_type action)
/* Change to an add if we're not using the same undo struct
* that we should be using. */
if (action != fs->last_action
|| (action != CUT && action != INSERT && action != SPLIT
|| (action != ENTER && action != CUT && action != INSERT && action != SPLIT
&& openfile->current->lineno != fs->current_undo->lineno)) {
add_undo(action);
return;
@ -1008,55 +1002,35 @@ void update_undo(undo_type action)
u = fs->undotop;
switch (u->type) {
case ADD:
case ADD: {
#ifdef DEBUG
fprintf(stderr, "fs->current->data = \"%s\", current_x = %lu, u->begin = %d\n",
fs->current->data, (unsigned long) fs->current_x, u->begin);
#endif
len = strlen(u->strdata) + 2;
data = (char *) nrealloc((void *) u->strdata, len * sizeof(char *));
data[len-2] = fs->current->data[fs->current_x - 1];
data[len-1] = '\0';
u->strdata = (char *) data;
char *char_buf = charalloc(mb_cur_max());
size_t char_buf_len = parse_mbchar(&fs->current->data[u->mark_begin_x], char_buf, NULL);
u->strdata = addstrings(u->strdata, u->strdata?strlen(u->strdata):0, char_buf, char_buf_len);
#ifdef DEBUG
fprintf(stderr, "current undo data now \"%s\"\n", u->strdata);
#endif
u->mark_begin_lineno = fs->current->lineno;
u->mark_begin_x = fs->current_x;
break;
case DEL:
len = strlen(u->strdata) + 2;
assert(len > 2);
}
case DEL: {
char *char_buf = charalloc(mb_cur_max());
size_t char_buf_len = parse_mbchar(&fs->current->data[fs->current_x], char_buf, NULL);
if (fs->current_x == u->begin) {
/* They're deleting. */
if (!u->xflags)
u->xflags = UNdel_del;
else if (u->xflags != UNdel_del) {
add_undo(action);
return;
}
data = charalloc(len);
strcpy(data, u->strdata);
data[len-2] = fs->current->data[fs->current_x];
data[len-1] = '\0';
free(u->strdata);
u->strdata = data;
} else if (fs->current_x == u->begin - 1) {
u->strdata = addstrings(u->strdata, strlen(u->strdata), char_buf, char_buf_len);
u->mark_begin_x = fs->current_x;
} else if (fs->current_x == u->begin - char_buf_len){
/* They're backspacing. */
if (!u->xflags)
u->xflags = UNdel_backspace;
else if (u->xflags != UNdel_backspace) {
add_undo(action);
return;
}
data = charalloc(len);
data[0] = fs->current->data[fs->current_x];
strcpy(&data[1], u->strdata);
free(u->strdata);
u->strdata = data;
u->begin--;
u->strdata = addstrings(char_buf, char_buf_len, u->strdata, strlen(u->strdata));
u->begin = fs->current_x;
} else {
/* They deleted something else on the line. */
free(char_buf);
add_undo(DEL);
return;
}
@ -1064,6 +1038,7 @@ void update_undo(undo_type action)
fprintf(stderr, "current undo data now \"%s\"\nu->begin = %d\n", u->strdata, u->begin);
#endif
break;
}
case CUT_EOF:
case CUT:
if (!cutbuffer)
@ -1095,11 +1070,15 @@ void update_undo(undo_type action)
break;
case REPLACE:
case PASTE:
add_undo(action);
u->begin = fs->current_x;
u->lineno = openfile->current->lineno;
break;
case INSERT:
u->mark_begin_lineno = openfile->current->lineno;
break;
case ENTER:
u->mark_begin_x = fs->current_x;
break;
#ifndef DISABLE_WRAPPING
case SPLIT:
/* This will only be called if we made a completely new line,
@ -1109,7 +1088,6 @@ void update_undo(undo_type action)
#endif /* !DISABLE_WRAPPING */
case UNSPLIT:
/* These cases are handled by the earlier check for a new line and action. */
case ENTER:
case OTHER:
break;
}